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<p>We have developed a theory for energy transfer between metallic and semiconductor nanoparticles due to the second harmonic generation (SHG). We have considered a plasmonic nanohybrid made of metallic and semiconductor nanoparticles that are separated by a dielectric layer. These particles are interacting with each other via surface plasmon polaritons (SPP) and dipole-dipole interaction (DDI). The SHG intensity due to energy transfer is calculated by using the nonlinear quantum density matrix method in the presence of the SPP and DDI polaritons. These SHG expressions can be useful for scientists and engineers to design and perform new experiments such as laser-induced plasmon heating and plasmonic photothermal therapy in brain tissues. Next, we have performed numerical simulation for the SHG intensity due to energy transfer from metallic to semiconductor nanoparticles. We found that there is enhancement in the intensity when the thickness of the layer is decreased. The enhancement is due to an extra contribution from the SPP and DDI polaritons. Further, we have compared our theory with experimental data due to the energy transfer between the Au-metallic and CuS-semiconductor nanoparticles separated by <InlineEquation ID="IEq1"> <EquationSource Format="TEX">\(\:{Al}_{2}{O}_{3}\)</EquationSource> </InlineEquation> layer. A good agreement between theory and experiment is found with <InlineEquation ID="IEq2"> <EquationSource Format="TEX">\(\:\:{R}^{2}=0.96\)</EquationSource> </InlineEquation>. The enhancement in the SHG intensity can be used to design and fabricate plasmonic nanosensors for the applications in nanotechnology and nanomedicine.</p>

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Energy Transfer Due to Second Harmonic Generations in Metallic and Semiconductor Nanohybrids

  • 期刊论文

  • 发表日期：

    2026年5月23日

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  • Shashankdhwaj Parihar,
  • Mahi R. Singh,
  • Sergey G. Yastrebov

摘要

We have developed a theory for energy transfer between metallic and semiconductor nanoparticles due to the second harmonic generation (SHG). We have considered a plasmonic nanohybrid made of metallic and semiconductor nanoparticles that are separated by a dielectric layer. These particles are interacting with each other via surface plasmon polaritons (SPP) and dipole-dipole interaction (DDI). The SHG intensity due to energy transfer is calculated by using the nonlinear quantum density matrix method in the presence of the SPP and DDI polaritons. These SHG expressions can be useful for scientists and engineers to design and perform new experiments such as laser-induced plasmon heating and plasmonic photothermal therapy in brain tissues. Next, we have performed numerical simulation for the SHG intensity due to energy transfer from metallic to semiconductor nanoparticles. We found that there is enhancement in the intensity when the thickness of the layer is decreased. The enhancement is due to an extra contribution from the SPP and DDI polaritons. Further, we have compared our theory with experimental data due to the energy transfer between the Au-metallic and CuS-semiconductor nanoparticles separated by \(\:{Al}_{2}{O}_{3}\) layer. A good agreement between theory and experiment is found with \(\:\:{R}^{2}=0.96\) . The enhancement in the SHG intensity can be used to design and fabricate plasmonic nanosensors for the applications in nanotechnology and nanomedicine.